CN117439228A - Charging inversion switching method - Google Patents
Charging inversion switching method Download PDFInfo
- Publication number
- CN117439228A CN117439228A CN202311423742.0A CN202311423742A CN117439228A CN 117439228 A CN117439228 A CN 117439228A CN 202311423742 A CN202311423742 A CN 202311423742A CN 117439228 A CN117439228 A CN 117439228A
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- Prior art keywords
- inversion
- inverter
- bin
- control board
- battery
- Prior art date
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- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000004044 response Effects 0.000 claims abstract description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 12
- 229910052744 lithium Inorganic materials 0.000 claims description 12
- YWXYYJSYQOXTPL-SLPGGIOYSA-N isosorbide mononitrate Chemical compound [O-][N+](=O)O[C@@H]1CO[C@@H]2[C@@H](O)CO[C@@H]21 YWXYYJSYQOXTPL-SLPGGIOYSA-N 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000011449 brick Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/80—Exchanging energy storage elements, e.g. removable batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
- H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a charging inversion switching method, which comprises the following steps: receiving a grid-connected inversion instruction of demand response, and turning off all chargers; judging whether each bin participates in grid-connected inversion or not; according to the battery bins which are determined to participate in inversion, sequentially sending serial instructions to single bins which are determined to participate in inversion; waiting for completion of serial connection of all single bins participating in inversion, and sending an inversion instruction to a main control board; closing a relay, connecting the battery pack in series with the inverter, and waiting for the start-up of the inverter; and sending a query state instruction to the inverter through the serial port, waiting for the normal standby of the inverter, and sending a starting instruction to the inverter. The safe charging and power changing function of the power changing cabinet is realized, and meanwhile, the power demand response of the power department can be responded, so that bricks and tiles are added for the novel power system construction.
Description
Technical Field
The invention relates to the technical field of battery changing cabinets, in particular to a charging inversion switching method.
Background
Along with the development of electric vehicles, the technology of the battery changing cabinet is also receiving more and more attention, and as an emerging device for specially charging batteries of the electric vehicles, users can directly put the batteries to be charged into the battery changing cabinet for charging and directly change the batteries with full electricity, so that normal riding can be met, and the trouble of charging can be omitted for the users.
In the summer period of the present year, the eastern China and the China are subjected to historic rare high-temperature weather, extreme high-temperature and drought disaster weather occurs in the southwest area, and the situation of supplying and demanding power for multiple powers is severe. The nations continuously organize and implement demand response for a plurality of days, and the maximum response load reaches 580 kilowatts. The power demand response technology has become the power supply protection measure adopted by each level of power authorities and power grid enterprises in the power marketing environment.
Meanwhile, the 'double carbon' target is put forward, and the novel power system is built, so that higher requirements are put forward for improving the flexibility adjusting capability of the power system and the power supply guarantee level of power users, and a wider platform is provided for further application and development of power demand response technology. At present, aiming at the charging and changing functions of a power changing cabinet in the market, only the charging and changing functions are supported, and no power changing cabinet structure and method capable of supporting grid-connected inversion exist in the face of complex design, test and authentication work.
Disclosure of Invention
The invention aims to: the invention aims to provide a charging inversion switching method capable of realizing safe charging and power conversion functions of a power conversion cabinet.
The technical scheme is as follows: in order to achieve the above object, the present invention provides a charging inversion switching method, comprising the steps of:
receiving a grid-connected inversion instruction of demand response, and turning off all chargers;
judging whether each bin participates in grid-connected inversion or not;
according to the battery bins which are determined to participate in inversion, sequentially sending serial instructions to single bins which are determined to participate in inversion;
waiting for completion of serial connection of all single bins participating in inversion, and sending an inversion instruction to a main control board;
closing a relay, connecting the battery pack in series with the inverter, and waiting for the start-up of the inverter;
and sending a query state instruction to the inverter through the serial port, waiting for the normal standby of the inverter, and sending a starting instruction to the inverter.
Further, when the demand response is finished, the system sends a shutdown command to the inverter;
monitoring the inversion stopping state of the inverter through a serial port;
if the inversion stop of the inverter is detected, the main control board is controlled to cut off the inversion switch, and the inverter is disconnected from the battery pack;
the string switch of each bin is sequentially disconnected, and the battery bin is disconnected from the inverter;
checking whether a battery compartment needing to be charged exists;
and if a battery compartment needing to be charged is provided, controlling the corresponding single compartment to charge.
Further, the step of determining whether each bin participates in grid-connected inversion includes
When the system needs inversion, the system main controller judges whether the bin participates in grid-connected inversion according to the electric quantity of the lithium battery,
when the electric quantity of the lithium battery is larger than 80% of the threshold value, the bin space participates in grid-connected inversion;
and when the total number of the participating bins is more than 2, starting grid-connected inversion.
Further, when the system is in a non-inversion state, the positive electrode node and the negative electrode node on the intelligent single-bin control board are in a short circuit state, and the total voltage of each single-bin group in series is 0.
Further, when the battery compartment needs to be charged, the intelligent single-compartment control panel firstly controls the direct current output loop of the charger to be closed, and then controls the alternating current input loop of the charger to be closed;
when the direct-current output loop of the charger is controlled to be closed, the intelligent single-bin control board firstly controls the DC_charge_Con pin to be at a high level, at the moment, the Mos tube Q9 is closed, 12V voltage is input to the two ends of the K1, the K1 relay is closed, and the direct-current output loop of the charger is charged and closed;
when the alternating current input loop of the charger is controlled to be closed, the intelligent single-bin control board firstly controls the pin AC_charge_Con to be at a high level, at the moment, the Mos tube Q10 is closed, 12V voltage is input at two ends of the K2, the K2 relay is closed, and the alternating current input loop of the charger is charged and closed.
Furthermore, when the battery compartment is closed for charging, the intelligent single-compartment control panel firstly controls the AC input circuit of the charger to be disconnected and then controls the DC output circuit of the charger to be disconnected.
Further, K1 is HF115F-012-2HS4, and K2 is HF42F/012-2HST.
Further, when the battery compartment is charged, the dc_charge_con output is high, Q14 is turned on, the U11 input is low, and the battery compartment cannot enter grid-connected inversion.
Further, U11 is SN74LVC1G08DBVR.
A charging inversion switching system is applied to a charging inversion switching method, which comprises a main control board, an inverter and a battery compartment,
the battery bins are connected in series, and are provided with an intelligent single-bin control board, a lithium battery and a charger, and the intelligent single-bin control board charges the lithium battery by controlling the charger;
the positive pole of the inverter is connected with the positive pole of the intelligent single-bin control board, the negative pole of the inverter is connected with the output node of the main control board, and the input node of the main control board is connected with the negative pole of the intelligent single-bin control board.
Further, the intelligent single-bin control boards are connected in series through wires, the negative electrode node of the first intelligent single-bin control board connected in series is connected with the positive electrode node of the second intelligent single-bin control board, the positive electrode node of the first intelligent single-bin control board is connected with the positive electrode of the inverter, and the negative electrode node of the last intelligent single-bin control board connected in series is connected with the input end of the main control board.
The beneficial effects are that: the invention not only realizes the safe charging and power changing functions of the power changing cabinet, but also can respond to the power demand response of the power department, and adds bricks and tiles for the construction of a novel power system.
Drawings
FIG. 1 is a flow chart of the method of example 1;
FIG. 2 is a charger DC side control;
fig. 3 is a charger ac control;
FIG. 4 is a battery compartment serial circuit intervention control;
fig. 5 is a schematic diagram of the system configuration of embodiment 2.
Detailed Description
Example 1
As shown in fig. 1, a charging inversion switching method includes the following steps:
s1, receiving a grid-connected inversion instruction of demand response, turning off all chargers, and reducing power loads;
s2, judging whether each bin participates in grid-connected inversion or not;
the step of judging whether each bin participates in grid-connected inversion comprises
When the system needs inversion, the system main controller judges whether the bin participates in grid-connected inversion according to the electric quantity of the lithium battery, and when the electric quantity of the lithium battery is greater than 80% of a threshold value, the bin participates in grid-connected inversion; and when the total number of the participating bins is more than 2, starting grid-connected inversion.
S3, sequentially sending serial instructions to single bins participating in inversion according to the battery bins participating in inversion
Further, when the system is in a non-inversion state, the nodes of the positive and negative serial circuits on the intelligent single-bin control board are in a short circuit state, and the total voltage of each single-bin group in series is 0.
S4, waiting for completion of serial connection of all single bins participating in inversion, and sending an inversion instruction to a main control board;
s5, closing a relay, connecting the battery pack in series with the inverter, and waiting for the start-up of the inverter;
s6, sending a query state instruction to the inverter through the serial port, waiting for the normal standby of the inverter, and sending a starting instruction to the inverter.
Further, when the demand response is finished, the system sends a shutdown command to the inverter;
monitoring the inversion stopping state of the inverter through a serial port;
the main inversion control board is controlled to cut off the main inversion switch, and the inverter is disconnected from the battery pack;
the string switch of each bin is sequentially disconnected, and the battery bin is disconnected from the inverter;
checking whether a battery compartment needing to be charged exists;
and if a battery compartment needing to be charged is provided, controlling the corresponding single compartment to charge. The method can safely close inversion, and compared with a hard cutting method, the method has the advantages of no large arc discharge and large surge current and higher safety.
As shown in fig. 2 and 3, when the battery compartment needs to be charged, the intelligent single-compartment control panel firstly controls the direct current output loop of the charger to be closed, and then controls the alternating current input loop of the charger to be closed; this reduces the inrush current to the relay closure.
When the direct-current output loop of the charger is controlled to be closed, the intelligent single-bin control board firstly controls the DC_charge_Con pin to be at a high level, at the moment, the Mos tube Q9 is closed, 12V voltage is input to the two ends of the K1, the K1 relay is closed, and the direct-current output loop of the charger is charged and closed; k1 is HF115F-012-2HS4;
when the alternating current input loop of the charger is controlled to be closed, the intelligent single-bin control board firstly controls the pin AC_charge_Con to be at a high level, at the moment, the Mos pipe Q10 is closed, 12V voltage is input at the two ends of the K2, the K2 relay is closed, and the alternating current input loop of the charger is charged and closed; k2 is HF42F/012-2HST.
When the battery bin is closed for charging, the intelligent single bin control panel firstly controls the AC input loop of the charger to be disconnected, and then controls the DC output loop of the charger to be disconnected. This reduces the inrush current of relay cut-off.
As shown in fig. 4, when the battery compartment is charged, the dc_charge_con output is high, Q14 is turned on, the U11 input is low, and the battery compartment cannot enter grid-connected inversion. U11 is SN74LVC1G08DBVR. The charging loop and the inversion serial loop cannot work simultaneously in hardware, and are safer and more reliable.
Example 2
As shown in fig. 5, a charging inversion switching system, applied to a charging inversion switching method, includes a main control board 1, an inverter 2 and a battery compartment 3,
the battery bins 3 are connected in series, the battery bins 3 are provided with an intelligent single-bin control board 4, a lithium battery 5 and a charger 6, and the intelligent single-bin control board 4 charges the lithium battery 5 by controlling the charger 6;
the positive pole of the inverter 2 is connected with the positive pole of the intelligent single-bin control board 4, the negative pole of the inverter 2 is connected with the output node of the main control board 1, and the input node of the main control board 1 is connected with the negative pole of the intelligent single-bin control board 4.
The intelligent single-bin control boards 4 are connected in series by a wire, the anode node of the first intelligent single-bin control board 4 connected in series is connected with the anode node of the second intelligent single-bin control board 4, the anode node of the first intelligent single-bin control board 4 is connected with the anode of the inverter 2, and the anode node of the last intelligent single-bin control board 4 connected in series is connected with the input end of the main control board 1.
The bin, each bin, the battery bin and the single bin all represent the same hardware structure.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (10)
1. The charging inversion switching method is characterized by comprising the following steps of:
receiving a grid-connected inversion instruction of demand response, and turning off all chargers;
judging whether each bin participates in grid-connected inversion or not;
according to the battery bins which are determined to participate in inversion, sequentially sending serial instructions to single bins which are determined to participate in inversion;
waiting for completion of serial connection of all single bins participating in inversion, and sending an inversion instruction to a main control board;
closing a relay, connecting the battery pack in series with the inverter, and waiting for the start-up of the inverter;
and sending a query state instruction to the inverter through the serial port, waiting for the normal standby of the inverter, and sending a starting instruction to the inverter.
2. The method for switching charge inverter according to claim 1, wherein,
when the demand response is finished, the system sends a shutdown command to the inverter;
monitoring the inversion stopping state of the inverter through a serial port;
if the inversion stop of the inverter is detected, the main control board is controlled to cut off the inversion switch, and the inverter is disconnected from the battery pack;
the string switch of each bin is sequentially disconnected, and the battery bin is disconnected from the inverter;
checking whether a battery compartment needing to be charged exists;
and if the battery bin needing to be charged is available, controlling the corresponding battery bin to be charged.
3. The method of claim 1, wherein the step of determining whether each bin is engaged in grid-tie inversion comprises
When the system needs inversion, the system main control board judges whether the warehouse space participates in grid-connected inversion according to the electric quantity of the lithium battery,
when the electric quantity of the lithium battery is larger than 80% of the threshold value, the bin space participates in grid-connected inversion;
and when the total number of the participating bins is more than 2, starting grid-connected inversion.
4. A charge inversion switching method according to claim 3 wherein,
when the system is in non-inversion, the positive and negative nodes on the intelligent single-bin control board are in a short circuit state, and the total voltage of each single-bin group in series is 0.
5. The method for switching charge inverter according to claim 2, wherein,
when the battery bin needs to be charged, the intelligent single bin control panel firstly controls the direct current output loop of the charger to be closed, and then controls the alternating current input loop of the charger to be closed;
when the direct-current output loop of the charger is controlled to be closed, the intelligent single-bin control board firstly controls the DC_charge_Con pin to be at a high level, at the moment, the Mos tube Q9 is closed, 12V voltage is input to the two ends of the K1, the K1 relay is closed, and the direct-current output loop of the charger is charged and closed;
when the alternating current input loop of the charger is controlled to be closed, the intelligent single-bin control board firstly controls the pin AC_charge_Con to be at a high level, at the moment, the Mos pipe Q10 is closed, 12V voltage is input at the two ends of the K2, the K2 relay is closed, and the alternating current input loop of the charger is charged and closed;
when the battery bin is closed for charging, the intelligent single bin control panel firstly controls the AC input loop of the charger to be disconnected, and then controls the DC output loop of the charger to be disconnected.
6. The method of claim 5, wherein K1 is HF115F-012-2HS4 and K2 is HF42F/012-2HST.
7. The method for switching charge inverter according to claim 2, wherein,
when the battery compartment is charged, the DC_charge_Con output is high level, the Q14 is conducted, the U11 input is low level, and the battery compartment cannot enter grid-connected inversion.
8. The method of claim 7, wherein U11 is SN74LVC1G08DBVR.
9. A charging inversion switching system is characterized in that the charging inversion switching system is applied to the charging inversion switching method according to any one of claims 1-8, and comprises a main control board, an inverter and a battery compartment,
the battery bins are connected in series, and are provided with an intelligent single-bin control board, a lithium battery and a charger, and the intelligent single-bin control board charges the lithium battery by controlling the charger;
the positive pole of the inverter is connected with the positive pole of the intelligent single-bin control board, the negative pole of the inverter is connected with the output node of the main control board, and the input node of the main control board is connected with the negative pole of the intelligent single-bin control board.
10. The system of claim 9, wherein the intelligent single-bin control boards are connected in series by wires, the negative node of the first intelligent single-bin control board is connected to the positive node of the second intelligent single-bin control board, the positive node of the first intelligent single-bin control board is connected to the positive electrode of the inverter, and the negative node of the last intelligent single-bin control board is connected to the input end of the main control board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311423742.0A CN117439228A (en) | 2023-10-30 | 2023-10-30 | Charging inversion switching method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311423742.0A CN117439228A (en) | 2023-10-30 | 2023-10-30 | Charging inversion switching method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117439228A true CN117439228A (en) | 2024-01-23 |
Family
ID=89545752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311423742.0A Pending CN117439228A (en) | 2023-10-30 | 2023-10-30 | Charging inversion switching method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117439228A (en) |
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2023
- 2023-10-30 CN CN202311423742.0A patent/CN117439228A/en active Pending
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